It was the call where firefighter armstrong got trapped on the first floor in a 2nd story structure fire. Oscar and 2 other firefighters from his company made entry through the front door. Another firefighter from another company jumped in with the Oscars company but the IC never saw him go in so they thought there were only 3. Not long after they made entry the first floor flashed over forcing them all out but oscar. Because IC didn't see the 4th firefighter from the other company go in with them they thought they had everyone was out until they heard the PASS going off. So they sent in a RIT team to rescue him and pulled him from the kitchen window. He died on the way to the hospital. The call changed the way the department operated greatly.